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%I #4 Apr 02 2015 17:04:35
%S 1,2,-1,5,-1,-1,-1,7,-1,-1,-1,7,-1,-1,-1,8,-1,-1,-1,-1,7,-1,-1,47,-41,
%T -1,-1,-1,14,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,11,1,1,1,1,1,1,1,1,1,1,1,1,
%U 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,133,-121,-1,-1
%N First differences of A166133.
%C a(n) != 0; abs(a(A256543(n))) = 1.
%H Reinhard Zumkeller, <a href="/A256541/b256541.txt">Table of n, a(n) for n = 1..10000</a>
%o (Haskell)
%o a256541 n = a256541_list !! (n-1)
%o a256541_list = zipWith (-) (tail a166133_list) a166133_list
%Y Cf. A166133, A256543.
%K sign
%O 1,2
%A _Reinhard Zumkeller_, Apr 01 2015